function createPath(parentDir, dirOrFile) {
  return parentDir.path + (parentDir.path == "/" ? "" : "/") + dirOrFile.name;
}

function createRelativePath(parentDir, dirOrFile) {
  let path = createPath(parentDir, dirOrFile);
  is(path[0], "/", "The full path should start with '/'");
  return path.substring(1);
}

function setup_tests(aNext) {
  SimpleTest.requestLongerTimeout(2);
  SpecialPowers.pushPrefEnv(
    {
      set: [
        ["dom.filesystem.pathcheck.disabled", true],
        ["dom.webkitBlink.dirPicker.enabled", true],
      ],
    },
    aNext
  );
}

function test_basic(aDirectory, aNext) {
  ok(aDirectory, "Directory exists.");
  ok(aDirectory instanceof Directory, "We have a directory.");
  is(aDirectory.path, "/" + aDirectory.name, "directory.path must be '/'+name");
  aNext();
}

function test_getFilesAndDirectories(aDirectory, aRecursive, aNext) {
  function checkSubDir(dir) {
    return dir.getFilesAndDirectories().then(function (data) {
      for (var i = 0; i < data.length; ++i) {
        ok(
          data[i] instanceof File || data[i] instanceof Directory,
          "Just Files or Directories"
        );
        if (data[i] instanceof Directory) {
          isnot(
            data[i].name,
            "/",
            "Subdirectory should be called with the leafname"
          );
          isnot(
            data[i].path,
            "/",
            "Subdirectory path should be called with the leafname"
          );
          isnot(
            data[i].path,
            dir.path,
            "Subdirectory path should contain the parent path."
          );
          is(
            data[i].path,
            createPath(dir, data[i]),
            "Subdirectory path should be called parentdir.path + '/' + leafname: " +
              data[i].path
          );
        }

        if (data[i] instanceof File) {
          is(
            data[i].webkitRelativePath,
            createRelativePath(dir, data[i]),
            "File.webkitRelativePath should be called: parentdir.path + '/' + file.name: " +
              data[i].webkitRelativePath
          );
          ok(
            !data[i].webkitRelativePath.endsWith("symlink.txt"),
            "We should never see a path ending with symlink.txt, our symlink sentinel."
          );
        }
      }
    });
  }

  aDirectory
    .getFilesAndDirectories()
    .then(
      function (data) {
        ok(data.length, "We should have some data.");
        var promises = [];
        for (var i = 0; i < data.length; ++i) {
          ok(
            data[i] instanceof File || data[i] instanceof Directory,
            "Just Files or Directories: " + data[i].name
          );
          if (data[i] instanceof Directory) {
            isnot(
              data[i].name,
              "/",
              "Subdirectory should be called with the leafname"
            );
            is(
              data[i].path,
              createPath(aDirectory, data[i]),
              "Subdirectory path should be called parentdir.path + '/' + leafname: " +
                data[i].path
            );
            if (aRecursive) {
              promises.push(checkSubDir(data[i]));
            }
          }

          if (data[i] instanceof File) {
            is(
              data[i].webkitRelativePath,
              createRelativePath(aDirectory, data[i]),
              "File.webkitRelativePath should be called file.name: " +
                data[i].webkitRelativePath
            );
          }
        }

        return Promise.all(promises);
      },
      function () {
        ok(false, "Something when wrong");
      }
    )
    .then(aNext);
}

function test_getFiles(aDirectory, aRecursive, aNext) {
  aDirectory
    .getFiles(aRecursive)
    .then(
      function (data) {
        for (var i = 0; i < data.length; ++i) {
          ok(data[i] instanceof File, "File: " + data[i].name);
          is(aDirectory.path[0], "/", "Directory path must start with '/'");
          ok(
            data[i].webkitRelativePath.indexOf(aDirectory.path.substring(1)) ==
              0 &&
              data[i].webkitRelativePath.indexOf("/" + data[i].name) +
                ("/" + data[i].name).length ==
                data[i].webkitRelativePath.length,
            "File.webkitRelativePath should be called dir.path + '/' + file.name: " +
              data[i].webkitRelativePath
          );
        }
      },
      function () {
        ok(false, "Something when wrong");
      }
    )
    .then(aNext);
}

function test_getFiles_recursiveComparison(aDirectory, aNext) {
  aDirectory
    .getFiles(true)
    .then(function (data) {
      is(data.length, 2, "Only 2 files for this test.");
      ok(
        data[0].name == "foo.txt" || data[0].name == "bar.txt",
        "First filename matches"
      );
      ok(
        data[1].name == "foo.txt" || data[1].name == "bar.txt",
        "Second filename matches"
      );
    })
    .then(function () {
      return aDirectory.getFiles(false);
    })
    .then(function (data) {
      is(data.length, 1, "Only 1 file for this test.");
      ok(
        data[0].name == "foo.txt" || data[0].name == "bar.txt",
        "First filename matches"
      );
    })
    .catch(function () {
      ok(false, "Something when wrong");
    })
    .then(aNext);
}
